Good morning everyone BMW 530D YEAR 2006 AND 60 I went to a workshop that tells me "I have replaced the battery in this car but if I look at the charge it gives me a value of 15.00 15.10 15.20 v not fixed but that keeps changing I have changed the battery with another but still the same problem, I have replaced the alternator but nothing has changed I have checked the various masses but the problem remains what can we do?"

Actually the charge is too high, it exceeds 15v, then I noticed that the car is fitted with a star and stop. I tell the mechanic to take the battery apart and he finds a normal acid battery, I take one of our AGM90D AGM technology, I go in with the diagnosis and have it recognised, I start the car and the alternator charges correctly, 14.30v, and now the car runs well.

Claudio.